1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lelu [443]
3 years ago
7

What is the sign of -567.45 + 567.45−567.45

Mathematics
1 answer:
Cloud [144]3 years ago
8 0

Answer:

The answer is (- 567.45)

You might be interested in
Suppose a 90% confidence interval for the mean salary of college graduates in a town in Mississippi is given by [$38,737, $50,46
JulsSmile [24]

Answer:

a. The point estimate was of $44,600.

b. The sample size was of 16.

Step-by-step explanation:

Confidence interval concepts:

A confidence interval has two bounds, a lower bound and an upper bound.

A confidence interval is symmetric, which means that the point estimate used is the mid point between these two bounds, that is, the mean of the two bounds.

The margin of error is the difference between the two bounds, divided by 2.

a. What is the point estimate of the mean salary for all college graduates in this town?

Mean of the bounds, so:

(38737+50463)/2 = 44600.

The point estimate was of $44,600.

b. Determine the sample size used for the analysis.

First we need to find the margin of error, so:

M = \frac{50463-38737}{2} = 5863

Relating the margin of error with the sample size:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.9}{2} = 0.05

Now, we have to find z in the Z-table as such z has a p-value of 1 - \alpha.

That is z with a pvalue of 1 - 0.05 = 0.95, so Z = 1.64.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

For this problem, we have that \sigma = 14300, M = 5863. So

M = z\frac{\sigma}{\sqrt{n}}

5863 = 1.645\frac{14300}{\sqrt{n}}

5863\sqrt{n} = 1.645*14300

\sqrt{n} = \frac{1.645*14300}{5863}

(\sqrt{n})^2 = (\frac{1.645*14300}{5863})^2

n = 16

The sample size was of 16.

7 0
3 years ago
1. What is the constant rate of change between x and y in the table below?
Murljashka [212]

Answer:

a

Step-by-step explanation: ya boi got at least a 90 in all classes

3 0
3 years ago
Read 2 more answers
What is the 1000positive integer with an odd number of digits?
Ket [755]
An answer can be 1357
8 0
3 years ago
Ms. Morrison rolls a die what’s the p ( rolls an even number)
kenny6666 [7]

Answer:

P(\frac{1}{2})

Step-by-step explanation:

There are 6 sides on a die, with 3 even numbers

Create a fraction: \frac{favorable outcomes}{total possible outcomes}

The fraction would be \frac{3}{6}, simplified to \frac{1}{2}.

6 0
3 years ago
Find the length of side AB.<br>Give your answer to 1 decimal place.​
Luden [163]

Answer:

The answer is below

Step-by-step explanation:

A triangle is a polygon with three sides and three angles. Types of triangles are isosceles, scalene, equilateral, acute, obtuse and right angled triangle. A right angle triangle is a triangle with one angle being 90°.

Trigonometric ratios is used to show the relationship between the angles and sides of a right angled triangle. Examples are:

sinΘ = opposite/hypotenuse; cosΘ = adjacent/hypotenuse; tanΘ = opposite/adjacent

From the question:

cos(62) = AB/12

AB = 12 * cos(62)

AB = 5.6 cm

4 0
3 years ago
Other questions:
  • Find two positive numbers if their ratio is 8:5 and the difference is 150.
    6·2 answers
  • in the given figure ABIICD . prove that angle BPO + angle POQ + angle DOQ = 4 right angles. 360 degrees
    15·1 answer
  • Which expression is equivalent to the given expression?
    13·1 answer
  • A refrigerator has a length of 4 feet, a width of 3 feet, and a height of 5 feet. What is the volume of the refrigerator? A. 17
    10·2 answers
  • For the function y=-2sin(pi/12(x-2) what is the maximum value
    6·1 answer
  • 2q-r=p, r=q-s, p=q+2r prove s=2r
    14·1 answer
  • Please help me!! <br> solve 31 = x + 25.5
    12·2 answers
  • 12. Solve for x. x = ___________
    10·1 answer
  • I would like a little help please.
    10·1 answer
  • PLEASE HELP NOW!!!! 85 POINTS GIVEN! North America and Eurasia are moving apart due to continental drift. Tanvi calculates that
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!